Electric heating element



July 1 1924. 1,499,409

v O.SCHAUMBERG ELECTR'IC HEATING ELEMENT Filed Nov. 1, 1922 WITNESS l'wzm-ofi Patented July 1,1924.

UNITED STATES. PATENT OFFICE.

OTTO SCHAUMBERG, F PITTSBURGH, PENNSYLVANIA.

ELECTRIC HEATING ELEMENT.

Application filed November 1, 1922. Serial No. 598,274.

To all whom z'tmay concern:

Be it known that I, O'r'ro SCHAUMBERG, a citizen ofv the United States, residing at Pittsburgh, in thecounty of Alleghen and State of Pennsylvania, have invente certain new and useful Improvements in ElectricHeating Elements, of which:the following is a specification v This inventionrelates to an electric heating element and has for its object to provide, in a manner as hereinafter set forth, a simple, compact, and very ruggedly constructed electric heating unit so designed and arranged that the resistance wire can be started out from one terminal, namely the negative terminal, and. by means of specially arranged ducts, passages and channels can be brought back or extended to the positive terminal in a concealed manner, permitting of the use of onecontinuous resistance wire beginning at the negative terminal and returning to the positive terminal,

'which last named terminal is positioned inthe same plane, along the side of and parallel to the positive terminal.

If nospecially arranged ducts, passages,

and channels would be'provided in the insulating structure, one of the lead wires, either the positive or the negative, would have to be extended ,fromthe finishing turn of the resistancecoil along the outside of the heating unit and back to the positive terminal, thus requiring special insulation to prevent the two wires from short circuiting, and furthermore encountering greater danger due to the less substantial construction and the liability of the lead wire being manner as disclosed in my invention.

broken and separated from the main resistance coil by the fact that the lead wire is not held in such a firm and substantial Another important object of my invention is to providean electric heating ele- Iment wherein but few essential parts are required to make one complete self-contained heating unit, nainely the main body with its ducts, passages and channels, made in its entirety of heat resisting insulating material, and the resistance wire of sultable material andlength to obtain suitable re sistance, said resistance wire being one contlnuous length, starting from one terminal and finishin on the other, and the metallic terminals 0' identical construction;

Further objects of the invention are to hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts herein specifically described, and illustrated in the accompanying drawing, wherein is shown an embodiment of the invention, but it is understood that changes, variations, and modfications may be resorted to, which come within the scope of the claims hereunto appended.

In the drawing forming a portion of this specification and wherein like numerals of reference designate corresponding parts throughout the several views Figure 1 is a side view of an electric heating element in accordance with this invention and with a portion shown in section.

Figure 2 is a rear end view thereof.

Figure 3 is a top plan View .of the device.

Figure 4 is a longitudinal sectional view of the heating element.

igure 5 is a transverse line V-V, Figure 4.

'Referring to the drawing it will be noted sectional view on ment as illustrated thereon is primarily designed for use in connection with a hair waving apparatus as disclosed in my co-pending patent application, bearing Serial No. 520,092, and filing date Dec. 5, 1921, but it will be obvious that the heating element may be of any desired contour to best meet requirements found in practice and in connection with any purposes wherein it is found to be applicable. The body portion 1 is curved longitudinally and is tapered in cross section, as clearly illustrated in Figure 5, 'of the drawing. The body portion 1 is constructed block 2 is formed with a recess 3 to permit of the proper mounting of the terminals} and 5, respectively, which are secured, in any suitablejmanner, in the terminal block that the configuration of the heating ele-"" 2 to extend in parallel, relatively ,to each other. The rear projecting ends of the terminals 4 and 5 provide the usual means for connecting the heating element with the source of electrical energy, while the forward ends thereof extend in the recess 3 and connect with the lead wires 6 and 7 of the resistance coil 8. 1

The wire used for constructing the re.- sistance coil 8 is such as to best meet conditions found in practice and is formed from one continuous length in connection with the lead wires 6 and 7. V

The resistance coil 8 is mounted on the body portion 1 by passing the lead wire 6 through the aperture 9, which latter extends transversely through the body portion 1 adjacent to the rear upper corner thereof, and

securing the said lead wire 6 to the terminal 4. The wire is now wound around the body portion 1, as clearly shown in Figure 1, to form the resistance coil 8. After the last lap of the coil' has been mounted on the body portion 1 the end of the wire forming the lead wire 7 is passed through the aperture 10, which latter extends transversely through the body portion 1 adjacent to the forward 'upper corner thereof. The lead'wire 7 is then drawn around the rear end of the body portion 1, as indicated at 11, and is inserted to extend rearwardly inthe groove or channel 12 which is formed and extends longitudinally in the upper edge of the body portion 1. The lead wire 7 is now passed through the vertical aperture 13, formed in the recess 3 of the body portion 1, and through the angularly disposed aperture 14 communicating with the vertical aperture,

- 13, and opening at the side of the body por tion, and is attachedto its proper terminal 5.

It will be noted that in my improved heating element but one piece of wire is used to form the resistance coil and lead wires, having its starting point in one terminal and terminating in the second terminal. Suchcoil structure is only possible by the use of a body portion formed with the channel 12' and apertures, as above described.

The arrangement of the lead wires 6 and 7 carry the same in such a way as to eliminate possibility of short circuiting at any point.

While not essential to the proper functioning of the heatingelement, the device may be. provided with a covering of insulating cement which can be painted over the entire body portion 1 to protect the resistance'c'oil nal block formed integrally with said body portion, a pair of terminals fixed in said terminal block, and a resistance coil consisting of one continuous length of wire and including lead wires connected with said terminals'one of said lead wires positioned in said groove, substantially as described and for the purpose set forth.

2. An electric heating element for the purpose set forth comprising a curved body portion of heat resisting insulation material, and formed with a longitudinally extending groove, a terminal block formed integrally with said body portion, a pair of terminals carried by said block, and a resistance coil consisting of one continuous length of wire wound on said body portion and including lead wires connected with said terminals, one of said lead wires positioned in said groove, substantially as described.

3. In combination, an electric heating element comprisinga body portion of heatresisting insulation material, and curved longitudinally, said body portion having its recess, a resistance coil consisting of one continuous conductor wound on said body portion and including a. pair of lead wires connected to said terminals, said body portion provided with a transverse aperture adj acent to its upper forward end, and with a transverse aperture and a' combined vertical and angular aperture formed adjacent to the upper rear end of said body portion, one of said lead wires extending through the transverse aperture at the rearend of said body portion,and the other of said lead wires extending through the transverse aper-' ture at the forward end of said body portion and positioned in said groove and extending through said combined aperture, substantially as described and for the purpose set forth.

In testimony whereof aflix my signature.

OTTO SCHAUMBERG. 

